Respuesta:
1/3
Explicación paso a paso:
2x + 7x + 12 = 15
9x = 15 - 12
9x = 3
x = 3/9 = 1/3
2 * 1/3 + 7 * 1/3 + 12 = 15
2/3 + 7/3 + 12 = 15
3 + 12 = 15
15 = 15
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Respuesta:
1/3
Explicación paso a paso:
2x + 7x + 12 = 15
9x = 15 - 12
9x = 3
x = 3/9 = 1/3
2 * 1/3 + 7 * 1/3 + 12 = 15
2/3 + 7/3 + 12 = 15
3 + 12 = 15
15 = 15